Attribute-based searchable encryption with delegated equality test in cloud-assisted Internet of Things

With the popularity of cloud-assisted Internet of Things, many industries need to upload a large amount of data to cloud servers. In this paper, we combine the ideas of PE-ET and CP-ABE to propose an attribute-based equivalent testing model (ABE-ET), which can realize the outsourcing data and search. We allow the cloud server to perform equivalent testing on the ciphertext to judge whether the encrypted ciphertext of two different owners is consistent, and determine if the data owners have the same identity. During the search and equivalent-test of ciphertext, the cloud server cannot obtain any encrypted message. In the security and performance analysis, we prove that this scheme is under the adaptive chosen ciphertext attacks (CCA2) security, and it is suitable for cloud-assisted Internet environment the efficiency of our algorithm.